What Is Advantages Of Primary Storage Device?

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Read this article mate and you will get your answer.

1. Two classifications of primary storage with which you should
   become familiar are read-only memory (ROM) and random-access memory
   (RAM).
   
2. READ-ONLY MEMORY (ROM).-In computers, it is useful to have
   instructions that are used often, permanently stored inside the
   computer. ROM enables us to do this without loosing the programs and
   data when the computer is powered down. Only the computer manufacturer
   can provide these programs in ROM; once done, you cannot change it.
   Consequently, you cannot put any of your own data or programs in ROM.
   Many complex functions, such as translators for high-level languages,
   and operating systems are placed in ROM memory.
   
3. Since these instructions are hardwired, they can be
   performed quickly and accurately. Another advantage of ROM is that your
   imaging facility can order programs tailored for its specific needs and
   have them installed permanently in ROM. Such programs are called
   micro programs or firmware.
   
4. RANDOM-ACCESS MEMORY (RAM).-RAM is another type of memory
   found inside computers. It may be compared to a chalkboard on which you
   can scribble down notes, read them, and erase them when finished. In
   the computer, RAM is the working memory. Data can be read (retrieved)
   or written (stored) in RAM by providing the computer with an address
   location where the data is stored or where you want it to be stored.
   When the data is no longer requited, you may simply write over it. Thus
   you can use the storage location again for something else.